CI/CD: Run examples job in parallel with coverage

The examples are only run for tags, we can therefore be rather sure that
most stages of the pipeline will succeed. To save a little bit of time,
we can run the examples job in parallel with the other tests and
coverage, especially because the examples take quite a while to run.

Note that we add coverage as an explicit dependency to the deploy job,
and as such sill require all jobs to succeed before deploying like.

.github/workflows/rtc-tools.yml

@@ -74,7 +74,7 @@ jobs:
   #   - run: codecov --token=$CODECOV_TOKEN
 
   examples-linux:
-    needs: coverage
+    needs: build
     runs-on: ubuntu-latest
     container:
       image: python:${{ matrix.version }}
@@ -96,7 +96,7 @@ jobs:
     - run: tox -vv
 
   deploy:
-    needs: [test-linux, examples-linux]
+    needs: [test-linux, coverage, examples-linux]
     runs-on: ubuntu-latest
     if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')  }}
     permissions: